UITableView Pt 7/10: DRAG AND DROP TO MOVE CELL IN TABLE VIEW SWIFT TUTORIAL

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UITableView and UITableViewController are used in almost all iOS apps. This is one of the most critical skills every iOS developer must master.

In this course, we will build a photos browser app using Table View and Table View Controller.

Join me today in this course, you’ll learn everything about Table View in these 10 lessons:
1. Introduction to UITableView and UITableViewController
2: Create Data Model Classes to Display On UITableView & UITableViewController
3: Create Basic UITableView and UITableViewController, UITableViewCell
4: Create Custom Table View Cell, Dynamic Table View Cell Height, Self-Sizing Cell
5. Create multiple sections in Table View
6. Delete rows from table view
7. Use drag and drop to move cells around table view
8. Create static table view
9. Use show segue and navigation controller to transition from master to detail view controller
10. Where to go from here.

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/************************************************/
CODE IN THIS COURSE – CONTROLLERS GROUP
/************************************************/

// ** AppleProductsTableViewController.swift
class AppleProductsTableViewController: UITableViewController
{
lazy var productLines: [ProductLine] = {
return ProductLine.productLines()
}()

// MARK: – VC Lifecycle

override func viewDidLoad() {
super.viewDidLoad()
navigationItem.rightBarButtonItem = editButtonItem

// Make the row height dynamic
tableView.estimatedRowHeight = tableView.rowHeight
tableView.rowHeight = UITableViewAutomaticDimension
}

override func viewWillAppear(_ animated: Bool) {
super.viewWillAppear(animated)

tableView.reloadData()
}

// MARK: – UITableViewDataSource

override func tableView(_ tableView: UITableView, titleForHeaderInSection section: Int) – String? {
let productLine = productLines[section]
return productLine.name
}

override func numberOfSections(in tableView: UITableView) – Int {
return productLines.count
}

override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) – Int {
let productLine = productLines[section]
return productLine.products.count // the number of products in the section
}

// indexPath: which section and which row
override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) – UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: “Product Cell”, for: indexPath) as! ProductTableViewCell

let productLine = productLines[indexPath.section]
let product = productLine.products[indexPath.row]

cell.configureCellWith(product)

return cell
}

// MARK: – Edit Tableview

override func tableView(_ tableView: UITableView, commit editingStyle: UITableViewCellEditingStyle, forRowAt indexPath: IndexPath) {
if editingStyle == UITableViewCellEditingStyle.delete {
let productLine = productLines[indexPath.section]
productLine.products.remove(at: indexPath.row)
// tell the table view to update with new data source
// tableView.reloadData() Bad way!
tableView.deleteRows(at: [indexPath], with: UITableViewRowAnimation.automatic)
}
}

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